National Institute of Environmental Health Sciences en Largest oil-spill health study needs volunteers <p style="color: rgb(51, 51, 51); font-family: Verdana, Helvetica, Arial, sans-serif, Geneva; font-size: 11px; line-height: 15px; ">Scientists studying long-term effects of the Gulf of Mexico oil spill are looking for 15,000 more people who worked on the cleanup, even for one day.</p> Tue, 24 Jul 2012 01:53:44 +0000 The Associated Press 16378 at